Make a few small fixes

.gitignore

@@ -7,6 +7,7 @@ _site
 .DS_Store
 Thumbs.db
 ehthumbs.db
+*.backup
 
 Gemfile.lock
 

docs/LocalServing.md

@@ -21,7 +21,7 @@ sudo gem install jekyll bundler
 
 ## Install the website dependencies
 
-Just `cd` into the directory where `Gemfile` is located, then:
+Just `cd` into the root directory of the project (where `Gemfile` is located), then:
 
 ```shell
 bundle install